Look at how we handle Taiwan for an idea of how wishy-washy the US government is in these situations.

Biden has said we support Taiwan and it’s independence, then directly after that our government walks it back to avoid escalating tensions with China.

Sorry I was definitely wrong about the US’s stance overall on Crimea, however we specifically were not providing armaments that could/would be used to attack Crimea

https://www.nytimes.com/2023/01/18/us/politics/ukraine-crimea-military.html

My initial statement was based on my incorrect memory of what was said after the initial faux-“referendum” that caused it to be annexed (forcefully taken) by Russia (which they tried to pretend was by the people living in crimea), as the US didn’t do much except slap a few sanctions on Russia.

I’ll edit my initial comment to better reflect the truth.